<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Entry.php 18951 2009-11-12 16:26:19Z alexander $
 */

/**
 * @see Zend_Feed_Reader
 */
require_once 'Zend/Feed/Reader.php';

/**
 * @see Zend_Feed_Reader_Extension_EntryAbstract
 */
require_once 'Zend/Feed/Reader/Extension/EntryAbstract.php';

/**
 * @see Zend_Date
 */
require_once 'Zend/Date.php';

/**
 * @category   Zend
 * @package    Zend_Feed_Reader
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Reader_Extension_DublinCore_Entry
extends Zend_Feed_Reader_Extension_EntryAbstract
{
	/**
	 * Get an author entry
	 *
	 * @param DOMElement $element
	 * @return string
	 */
	public function getAuthor($index = 0)
	{
		$authors = $this->getAuthors();

		if (isset($authors[$index])) {
			return $authors[$index];
		}

		return null;
	}

	/**
	 * Get an array with feed authors
	 *
	 * @return array
	 */
	public function getAuthors()
	{
		if (array_key_exists('authors', $this->_data)) {
			return $this->_data['authors'];
		}

		$authors = array();
		$list = $this->_xpath->evaluate($this->getXpathPrefix() . '//dc11:creator');

		if (!$list->length) {
			$list = $this->_xpath->evaluate($this->getXpathPrefix() . '//dc10:creator');
		}
		if (!$list->length) {
			$list = $this->_xpath->evaluate($this->getXpathPrefix() . '//dc11:publisher');

			if (!$list->length) {
				$list = $this->_xpath->evaluate($this->getXpathPrefix() . '//dc10:publisher');
			}
		}

		if ($list->length) {
			foreach ($list as $author) {
				if ($this->getType() == Zend_Feed_Reader::TYPE_RSS_20
				&& preg_match("/\(([^\)]+)\)/", $author->nodeValue, $matches, PREG_OFFSET_CAPTURE)
				) {
					$authors[] = $matches[1][0];
				} else {
					$authors[] = $author->nodeValue;
				}
			}

			$authors = array_unique($authors);
		}

		$this->_data['authors'] = $authors;

		return $this->_data['authors'];
	}

	/**
	 * Get the entry content
	 *
	 * @return string
	 */
	public function getContent()
	{
		return $this->getDescription();
	}

	/**
	 * Get the entry description
	 *
	 * @return string
	 */
	public function getDescription()
	{
		if (array_key_exists('description', $this->_data)) {
			return $this->_data['description'];
		}

		$description = null;
		$description = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc11:description)');

		if (!$description) {
			$description = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc10:description)');
		}

		if (!$description) {
			$description = null;
		}

		$this->_data['description'] = $description;

		return $this->_data['description'];
	}

	/**
	 * Get the entry ID
	 *
	 * @return string
	 */
	public function getId()
	{
		if (array_key_exists('id', $this->_data)) {
			return $this->_data['id'];
		}

		$id = null;
		$id = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc11:identifier)');

		if (!$id) {
			$id = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc10:identifier)');
		}

		$this->_data['id'] = $id;

		return $this->_data['id'];
	}

	/**
	 * Get the entry title
	 *
	 * @return string
	 */
	public function getTitle()
	{
		if (array_key_exists('title', $this->_data)) {
			return $this->_data['title'];
		}

		$title = null;
		$title = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc11:title)');

		if (!$title) {
			$title = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc10:title)');
		}

		if (!$title) {
			$title = null;
		}

		$this->_data['title'] = $title;

		return $this->_data['title'];
	}

	/**
	 *
	 *
	 * @return Zend_Date|null
	 */
	public function getDate()
	{
		if (array_key_exists('date', $this->_data)) {
			return $this->_data['date'];
		}

		$d    = null;
		$date = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc11:date)');

		if (!$date) {
			$date = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/dc10:date)');
		}

		if ($date) {
			$d = new Zend_Date;
			$d->set($date, Zend_Date::ISO_8601);
		}

		$this->_data['date'] = $d;

		return $this->_data['date'];
	}

	/**
	 * Register DC namespaces
	 *
	 * @return void
	 */
	protected function _registerNamespaces()
	{
		$this->_xpath->registerNamespace('dc10', 'http://purl.org/dc/elements/1.0/');
		$this->_xpath->registerNamespace('dc11', 'http://purl.org/dc/elements/1.1/');
	}
}
